Valve structure for internal-combustion motors



A. WINTON.

VALVE STRUCTURE FOR INTERNAL COMBUSTION MOTORS.

APPLICATION FILED APR.25, 1919.

1376,0600 Patented Apr. 26,1921;

rrE

sT rEs TENT VALVE srnucrnnn ron To all whom it may concern:

Be it known that I, ALEXANDER WINTON,

a citizen of the United States, residing at which the following is aspecification.

The invention forming the subject matter of this application relates toint rnal combustion engines and particularl to means for preventing theoverheating of the exhaust valves.

In internal combustion engines, especially of the light compressiontype, great difiiculty results from the overheating of the exhaustvalves. Indeed, the heat actlng uponthese valves is so great that manytimes the head of the valve becomes deformed due to the hammering of thevalve upon its seat when so heated. Heretofore there has been no veryconvenient manner of cooling this valve. In the present app llcation,however, an arrangement 1s d1sclosed for circulating a cooling mediumabout the head of the valve, thereby lowering the temperature thereof tosuch an extent as to prevent deformation of the valve and injurythereto.

The invention may be further summarized as' consisting in theconstruction and combination of parts hereinafter set forth in thefollowing description, drawings and claim.

-In the drawing, the figure represents the upper portion of a part of acyllnder w th a head applied thereto, the parts being shown in sectionto show the invention.

In the embodiment shown, 1 represents a cylinder having a head 2 appliedthereto. The head 2 is provided with an exhaust opening 3 and an intakeopening {L The intake opening receives a valve cage 5 adapted to receiveand lde an intake valve stem 6 having a valve ead 7.

In like manner this exhaust valve opening 3 receives anexternal valvecage comprising a valve seat portion 8, webs 9 and an upper guide 10.This guide 10 is interal with a hollow cylindrical ortion 11 vvhiohfextends out above cyliiider head. The upper open end of thiscylindrical portion 11 is closed by a plston guide 12 shd- Specificationof Letters Patent.

INTERNAL-COMBUSTION MOTORS.

Patented Apr. 26, 1921.

Application filed April 25, 1919. Serial No. 292,687.

ably mounted in the cylindrical portion 11. Thls piston guide 12 has acentral valve stem opening 13 for the exhaust valve stem 14 whichextends down through the entire valve cage structure and is providedwith a valve 15 at its lower end adapted to co operate with the valveseat portion 8. The piston guide 12 engages a pin 14: passing throughthe Valve stem 14. A spring 15' 18 arranged between the piston guide andthe guide 10 for holding the former against the pin 14'.

The cylindrical portion 11 is provided with a side threaded opening 16receiving an air or other cooling fluid pipe 17 connected to an air pump18 or any other source of cooling fluid supply. Suitable openings ,19extend through the guide 10 in a direction to direct the discharge ofcooling medium from the chamber in the cylindrical portion 11 againstthe valve within the seat portion 8. The exhaust valve cage is locatedin an exhaust chamber 20 which is in communication with an exhaust port21 so that the air directed against the exhaust valve and its seatdischarges freely into this exhaust chamber and out through the exhaustport.

From the foregoing it will be seen that the cool air delivered to thehollow cylindrical portion will be delivered to the valve cage and valvein a manner to keep these parts cool and prevent their becomingoverheated.

What I claim is In an internal combustion motor, a cylinder, a headtherefor having an exhaust valve cage opening and an exhaust chamber incommunication therewith, an exhaust valve cage mounted therein andcomprising a valve seat portion and an air chamber member connectedtherewith, said air chamber member having a valve stem openingtherethrough and a series of air discharge openings surrounding saidstem opening, an exhaust valve having a stem ALEXANDER 'WINTON.

